PRYM 610943 Parallel tracing wheel 'Multi' ERGONOMIC, 1 piece Ergonomic design, facilitates fatigue-free working. Marks and traces seam and cutting lines. Combination of chalk wheel Mouse and tracing unit. Seam and cutting lines in widths of 15, 25 and 40mm are easy to mark. Foam-backed nylon covering allows easy pinning and marking.